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Title: Dimming the Lights: 2D Simulations of Deflagrations of Hybrid C/O/Ne White Dwarfs Using FLASH

Abstract

Abstract The dimmest and most numerous outlier of the Type Ia supernova population, the Type Iax event, is increasingly being found in the results of observational campaigns. There is currently no single accepted model to describe these events. This 2D study explores the viability of modeling Type Iax events as a hybrid C/O/Ne white dwarf progenitor undergoing a deflagration using the multiphysics software FLASH. This hybrid was created using the stellar evolution code MESA, and its C-depleted core and mixed structure have demonstrated lower yields than traditional C/O progenitors in previous deflagration-to-detonation studies. To generate a sample, 30 “realizations” of this simulation were performed, the only difference being the shape of the initial match head used to start the deflagration. Consistent with earlier work, these realizations produce the familiar hot dense bound remnant surrounded by sparse ejecta. Our results indicate that the majority of the star remains unburned (∼70%) and bound (>90%). Our realizations produce total ejecta yields on the order of 10 −2 –10 −1 M ☉ , ejected 56 Ni yields on the order of 10 −4 –10 −2 M ☉ , and ejecta kinetic energies on the order of 10 48 –10 49 erg. Compared to yieldsmore » inferred from recent observations of the dimmest Type Iax events—SN 2007qd, SN 2008ha, SN 2010ae, SN 2019gsc, SN 2019muj, SN 2020kyg, and SN 2021fcg—our simulation produces comparable 56 Ni yields but too-small total yields and kinetic energies. Reignition of the remnant is also seen in some realizations.« less

Authors:
ORCiD logo; ORCiD logo; ORCiD logo; ORCiD logo; ORCiD logo; ORCiD logo
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
2229808
Grant/Contract Number:  
FG02-87ER40317
Resource Type:
Published Article
Journal Name:
The Astrophysical Journal
Additional Journal Information:
Journal Name: The Astrophysical Journal Journal Volume: 959 Journal Issue: 2; Journal ID: ISSN 0004-637X
Publisher:
American Astronomical Society
Country of Publication:
United States
Language:
English

Citation Formats

Feldman, Catherine, Gutierrez, Nathanael, Eisenberg, Ellis, Willcox, Donald E., Townsley, Dean M., and Calder, Alan C. Dimming the Lights: 2D Simulations of Deflagrations of Hybrid C/O/Ne White Dwarfs Using FLASH. United States: N. p., 2023. Web. doi:10.3847/1538-4357/acf658.
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Feldman, Catherine, Gutierrez, Nathanael, Eisenberg, Ellis, Willcox, Donald E., Townsley, Dean M., & Calder, Alan C. Dimming the Lights: 2D Simulations of Deflagrations of Hybrid C/O/Ne White Dwarfs Using FLASH. United States. https://doi.org/10.3847/1538-4357/acf658
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Feldman, Catherine, Gutierrez, Nathanael, Eisenberg, Ellis, Willcox, Donald E., Townsley, Dean M., and Calder, Alan C. Tue . "Dimming the Lights: 2D Simulations of Deflagrations of Hybrid C/O/Ne White Dwarfs Using FLASH". United States. https://doi.org/10.3847/1538-4357/acf658.
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@article{osti_2229808,
title = {Dimming the Lights: 2D Simulations of Deflagrations of Hybrid C/O/Ne White Dwarfs Using FLASH},
author = {Feldman, Catherine and Gutierrez, Nathanael and Eisenberg, Ellis and Willcox, Donald E. and Townsley, Dean M. and Calder, Alan C.},
abstractNote = {Abstract The dimmest and most numerous outlier of the Type Ia supernova population, the Type Iax event, is increasingly being found in the results of observational campaigns. There is currently no single accepted model to describe these events. This 2D study explores the viability of modeling Type Iax events as a hybrid C/O/Ne white dwarf progenitor undergoing a deflagration using the multiphysics software FLASH. This hybrid was created using the stellar evolution code MESA, and its C-depleted core and mixed structure have demonstrated lower yields than traditional C/O progenitors in previous deflagration-to-detonation studies. To generate a sample, 30 “realizations” of this simulation were performed, the only difference being the shape of the initial match head used to start the deflagration. Consistent with earlier work, these realizations produce the familiar hot dense bound remnant surrounded by sparse ejecta. Our results indicate that the majority of the star remains unburned (∼70%) and bound (>90%). Our realizations produce total ejecta yields on the order of 10 −2 –10 −1 M ☉ , ejected 56 Ni yields on the order of 10 −4 –10 −2 M ☉ , and ejecta kinetic energies on the order of 10 48 –10 49 erg. Compared to yields inferred from recent observations of the dimmest Type Iax events—SN 2007qd, SN 2008ha, SN 2010ae, SN 2019gsc, SN 2019muj, SN 2020kyg, and SN 2021fcg—our simulation produces comparable 56 Ni yields but too-small total yields and kinetic energies. Reignition of the remnant is also seen in some realizations.},
doi = {10.3847/1538-4357/acf658},
journal = {The Astrophysical Journal},
number = 2,
volume = 959,
place = {United States},
year = {Tue Dec 12 00:00:00 EST 2023},
month = {Tue Dec 12 00:00:00 EST 2023}
}
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